Oar



WALTER Gr. BOLTON", OF SPRINGFIELD, MASSACHUSETTS.

OAR.

Leonesa.

Specification of Letters Patent.

Patented Dec.` 27, 1921.

Application med-November 16, 1920. Serial No. 424,446.

To all whom t may con-cera.'

Be it known that I, l/VALTER G. BOLTON, a citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Gars, o-f which the following is -a specification.

This invention relates to improvements 1n oars, the principal object of the invention being to provide an oar of great strength and stiness while at the same time making it of a minimum weight and of good balance.

In carrying out my invention I provide an oar of hollow construction and provided with a longitudinally extending brace thus securing lightness and strength.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described,

illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure l is a front view of an oar constructed in accordance with my invention, parts being shown in section.

Fig. 2 is a side view of the Oar.

Fig. 3 is a section on line 3-3 of Fig. 2.

Fig. 4 is a section on line 4 4 of Fig. 2.

Fig. 5 is a section on line 5 5 of Fig. 2.

As shown in these views the oar is made of five different sections, the centrally arranged bracesection l, the two side sections or pieces 2 and the two bla-de side pieces 3, the sections being suitably secured together. The inner faces of the side pieces 2 are provided with the longitudinally extending grooves 4, each piece being provided with two grooves which have their inner ends aced apart so that aportion of the oar, substantially midway between its center any desired manner. The blade of the oar, v I

as will be seen is made up of the end portions of the pieces l and 2 and the side pieces 3. This blade can be made of any desired shape.

I prefer to make the central piece l of hard wood while the rest of the oar is preferably made of spruce. TheY central piece l may be made of several thicknesses or of a single piece.

My improved oar is of great strength and is extremely light. The brace` piece by eX- tending entirelythrough the oar from the front to the back stiflens the oar and is a much better arrangement than by having an interior brace. My invention gives balance to the oar and while it is mainly designed for long oars as used in the United States Navy racing cutters and to the racing boats it will ofcourse be understood that it may be used in other types of oars.

It is thought from the foregoing description that the advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

What I claim is:

An oar of the character described comprising a central piece extending entirely through the oar from blade to handle, a pair of sides connected with the central piece and having longitudinally extending grooves formed on their inner faces each side being solid midway its ends, a sleeve surrounding and secured to said solid portion and a pair of blade side pieces connected with the first mentioned side pieces.

In testimony whereof I aliX my signature.

WALTER G. BOLTON; 

